An Aldi shopper has accidentally started a huge debate online after sharing what she thought was a great gift idea from the supermarket.
Taking to Facebook, the shopper shared photos of her new $30 Crofton six-piece knife set with a sharpener, writing: "Brought this knife block set at Aldi today. So impressed [at] how nice it is for only $29.99! Great for a gift idea."
They added in the comments that they thought the knives would be perfect for a house warming gift or for someone moving out for the first time.
The suggestion to give the knives as gifts quickly became a hot topic, with one user commenting: "Bite me if you like, but you don’t give knives as gifts, they cut the friendship or bond. (Old wives tale)."
"Great knives they look nice, not to gift though as it’s bad luck," another added.
"I was always told you give a coin with the knives not to cut the friendship," someone else wrote. Another agreed, adding: "If you give knives as a gift you have to give a coin with it. It's meant to stop the bad luck. Another old wives tale."
"I was just going to say the same," one user wrote. "Twice people have given our family lovely knives and both times the friendship got cut off."
"Well this explains the demise of a 6-year relationship after some $400 knives," another said.
Another suggested that having knives on display in a home is bad Feng Shui and can cause fighting.
Superstition suggests the giver must also gift a penny, or another coin of symbolic value, with the knives. The coin must then be returned to the giver as a form of symbolic payment to prevent the relationship from being severed.
The knives should also be carefully handled and only used when needed.
The superstition exists in Japan as well as countries across Europe with people believing a gift of knives or scissors means cutting the relationship between the gift giver and the receiver.
Apparently, superstition also suggests you should keep a knife in a jar of water by the front and back doors of a home to ward off evil spirits as they're afraid of their reflections in water and on a knife's surface.
One user joked: "With all the talk of how gifting knives has lead to people not talking to each other. Off to Aldi tomorrow to buy a dozen of them."
Another wrote: "FFS. Great knife set. Well done on your buy and do what you like with it. I would have loved a decent knife set gifted to me when [my] husband and I [were] newlyweds and broke. Enjoy your purchase or enjoy passing it on."
Other Facebook commenters simply gave the knives a great review with one person suggesting they were so sharp they managed to slice her hand open. Someone else said they were still "excellent" one and a half years after buying them.
Never miss a thing. Sign up to Yahoo Lifestyle’s daily newsletter.
Or if you have a story idea, email us at firstname.lastname@example.org.